MATHEMATICS MIDDLE SCHOOL

Photo attached! 10 points! Thank you in advance!!

Answers

Answer 1

Answer:

$ax^2+bx+c=0\n\nx^2+7x+9=3\qquad|\text{subtract 3 from both sides}\n\nx^2+7x+9-3=3-3\n\n\boxed{x^2+7x+6=0\to A.}$

$a=1,\ b=7,\ c=6$

Answer 2

Answer:

The answer is A because you subtract 3 from both sides to get the equation set to 0

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What is the fraction for 0.27 repeating?

Answers

The decimal number, 0.27 repeating can be written in the form of a fraction $(3)/(11)$ .

Given that:

A decimal number is 0.27 repeating.

This can be written as 0.272727...

This decimal number has to be written in the form of a fraction.

Let x = 0.2727... [Equation 1]

Multiply both sides of the equation by 10.

100x = 100 × 0.2727...

100x = 27.2727... [Equation 2]

Now, subtract [Equation 1] from [Equation 2].

100x - x = 27.2727... - 0.2727...

99x = 27

Divide both sides by 99.

$x=(27)/(99)$

Since 99 and 27 have a common factor of 9, this can be written as:

$x=(3)/(11)$

Hence, the required fraction is $(3)/(11)$ .

Learn more about Fractions here :

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1\27 i would really say

How do you solve this problem? 6 x 2/5 =

Answers

You have to make 2/5 into a whole number , in this case a decimal
2/5 in decimal form = 0.4
To make it easier for you 0.4 by 10 and then it will become 4
So 6x4=24
Then divide by 10 which will become 2.4
The answer is 2.4

Best answer gets a Brainliest! On a boat, a cabin's window is in the shape of an isosceles trapezoid, as shown below. What is the area of the window?

196 square inches
240 square inches
252 square inches
392 square inches

Answers

Area of a trapezium = (h/2)[a + b]
h = 14
a = 10
We need to find b!
B = 10 + 4 + 4 = 18
So,(14/2)[10 + 18]
7 * 28 = 196 square inches.

Hope this helps :)

We can easily find the area of the square so lets solve that first.
10x14= 140

Now we need to solve the triangles outside the square
14x4=56
This would the area of a rectangle/square and thats a triangle so cut it in half
56/2=28

Square (140) + 2 Triangles (28 + 28) = 196

A machine uses an input force of 200 newton to produce an output force of 800 newtons. What is the mechanical advantage of the machine?

Answers

we just need to subtract one number from the other:
mechanical advantage = output - input
= 800 - 200
= 600
hence the mech. advantage of the machine is 600 newtons

Answer:

wrong

Step-by-step explanation:

200 -800 is well i dobn't know i need friends i name is falling water i have no friends

How does finding the greatest common factor help you to solve real-world problems?

Answers

Assuming you're asking about the GCF (Greatest Common Factor) Greatest Common Factors (GCF) can help you in real life problems with fractions and measuring things. Below is a real life example.Let's say you want to send cookies into one of two classes and want to make sure you have an even number per student. You know that one class has 8 students and the other has 10 students. How many cookies do you make?Answer: All you have to do is figure out the biggest number that goes into each number equally (division). In this case the answer would be 2. If i helped please comment below And i hope i helped you!

What does 5/6+2/3 equal

Answers

$(5)/(6)+ (2)/(3)= [(3)/(2) or 1 (1)/(2)]$
Hope I helped! :-)

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